Silicon-oxygen tetrahedron (SiO44-) has a free electron to bond at each of its four corners. Which of the following is NOT a way that these silicon-oxygen tetrahedra can bond together?


Framework silicates, where all corners are shared between 2 tetrahedra

Chains of tetrahedra linked at 2 corners

Tetrahedra link at the corners to form cubes

Isolated single tetrahedra bonded to other elements